Mechanical Engineering Faculty Research

Title

Role of Wrinkle Height in Friction Variation with Number of Graphene Layers

Document Type

Article

Publication Date

2012

Abstract

Molecular dynamics simulations are performed to study the frictional behavior of graphene. It is found that the friction between a diamond tip and graphene decreases with increasing number of graphene layers. This behavior is also affected by the graphene sheet size; specifically, the effect of the number of layers on friction becomes significant only when the modeled graphene sheets exceed a critical length. We further show that the frictional behavior can be directly correlated to the height of near-contact wrinkles that resist sliding. These observations are rationalized in terms of the ability of multiple sheets to act as a single material as they resist wrinkle formation.

Publication Title

Journal of Applied Physics

Volume

112

First Page

116102